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基于外部光注入的光泵浦自旋垂直腔表面发射激光器(vertical cavity surface-emitting laser,VCSEL)的两个混沌偏振分量,提出了对两个复杂形状目标中的多区域精确测距方案.这里,两个混沌偏振探测波具有飞秒量级快速动态并且被双极性sinc波形调制,使它们具有时空不相关特性.利用这些特性,通过计算多束延时反馈混沌偏振探测波形和与之相对应的参考波形的相关性,实现了对两个复杂形状目标多区域位置矢量精确测量.研究结果表明,对多区域小目标的测距具有非常低的相对误差(低于0.94%).当光电探测器的带宽足够大时,其测距的分辨率达到0.4 mm,并具有很强的抗噪声能力.本文的研究结果在复杂形状目标的精确测距方面具有潜在应用. 相似文献
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利用单-(6-氧-对甲基苯磺酰基)-β-环糊精和2-呋喃甲硫醇反应得到单修饰环糊精, 单[6-硫-6-(2-甲基呋喃)]-β-环糊精. 通过X-ray衍射分析及核磁光谱等方法研究了其在溶液和固态中形成线状超分子的分子自组装行为. 结果表明, 化合物在固态中通过呋喃基团从第二面羟基连续插入到另一个环糊精的空腔, 形成了互锁式螺旋柱状超分子, 而且在溶液中也显示了相似的自组装行为, 其键合常数K及聚合度n分别为450 mol-1·L和1.9. 相似文献
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Multi-target ranging using an optical reservoir computing approach in the laterally coupled semiconductor lasers with self-feedback 下载免费PDF全文
Dong-Zhou Zhong 《中国物理 B》2022,31(7):74205-074205
We utilize three parallel reservoir computers using semiconductor lasers with optical feedback and light injection to model radar probe signals with delays. Three radar probe signals are generated by driving lasers constructed by a three-element laser array with self-feedback. The response lasers are implemented also by a three-element lase array with both delay-time feedback and optical injection, which are utilized as nonlinear nodes to realize the reservoirs. We show that each delayed radar probe signal can be predicted well and to synchronize with its corresponding trained reservoir, even when parameter mismatches exist between the response laser array and the driving laser array. Based on this, the three synchronous probe signals are utilized for ranging to three targets, respectively, using Hilbert transform. It is demonstrated that the relative errors for ranging can be very small and less than 0.6%. Our findings show that optical reservoir computing provides an effective way for applications of target ranging. 相似文献
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为了解决医疗废物热转化过程中氯导致设备腐蚀及二噁英生成等潜在危险,选取高氯成分聚氯乙烯(PVC)典型组分作为医疗废物的模型化合物,开展了转炉烟尘催化医疗废物低温热解脱氯提质实验研究,考察了热解温度、催化剂种类及添加量等对医疗废物低温热解脱氯的影响。结果显示,270?C时PVC热解脱氯率由无转炉粉尘添加时的57.94%提升到转炉粉尘添加量为0.2 g·g-1PVC时的72.57%,表明转炉粉尘对PVC热解脱氯过程具有显著的促进作用。PVC热解脱氯最佳工况为:热解温度270?C、转炉粉尘添加量0.2 g·g-1 PVC、热解时间30 min,此时医疗废物最佳脱氯率为72.57%和半焦热值高达42.47 MJ·kg-1。 相似文献
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